Whole Snapper with Crispy Potatoes

• 800 g whole snapper, gutted and scaled
• 1 lemon, thinly sliced
• 6 sprigs thyme
• .5 brown onion, thinly sliced
• 4 cloves garlic, thinly sliced
• 4 vine ripened tomatoes, sliced
• 6 new potatoes, thinly sliced
• 2 tbsp extra virgin olive oil
• 250 g broccolini